<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <script src="./lib/react.js"></script>
    <script src="./lib/react-dom.js"></script>
    <script src="./lib/browser.js"></script>
</head>
<body>
    <div id="root"></div>
    <script type="text/babel">
        class APP extends React.Component{
            constructor(props){
                super(props)
                this.state={
                    loading:true
                }
            }
            componentDidMount(){
                setTimeout(()=>{
                    this.setState({
                        loading:false
                    })
                },3000)
            }
            render(){
                    if(this.state.loading){
                        return <h1>正在加载.....</h1>
                    }else{
                        return (
                            <div><h1>数据列表</h1></div>
                        )
                    }
                }
        }
        
        ReactDOM.render(<APP/>,document.getElementById("root"))

    </script>
</body>
</html>